Global economic impacts of Middle East gas field strikes

Energy prices have sharply surged on global markets following Israeli strikes on Iran's South Pars gas field - the world's largest natural gas reserve. Iran has retaliated with strikes targeting major energy infrastructure inside Qatar, Saudi Arabia and the UAE. US President Donald Trump says America knew nothing of Israel's attack on South Pars - promising that Israel will launch no more attacks on Iranian oil infrastructure. GUEST: David Butter is an economics and energy analyst and Associate Fellow of the Middle East and North Africa programme at Chatham House PRODUCER: Eddy Diamond